<!DOCTYPE html>
<html xmlns="http://www.w3.org/1999/xhtml"
      xmlns:th="http://www.thymeleaf.org"
      xmlns:sec="http://www.thymeleaf.org/thymeleaf-extras-springsecurity3">
<head>
    <meta charset="UTF-8">
    <title>Spring Security Example</title>
</head>
<body>
  <div th:if="${param.error}">
    <b style="color:red">用户名或密码错误</b>
  </div>
  <div th:if="${param.logout}">
      <b style="color:cadetblue">您已注销成功</b>
  </div>
  <form th:action="@{/login}" method="post">
    <div><label> ⽤户名: <input type="text" name="username"/> </label></div>
    <div><label> 密 码 : <input type="password" name="password"/> </label></div>
    <div><input type="submit" value="登录"/></div>
  </form>
</body>
</html>